Improvement in machines foe boeing window-blinds



@geiten tat-es @anni @fitta Lam Patent No. 82,803, and october c, 1868.

IMPROVEMENT IN MACHINES EOE BORING WITIDOWBLINDS,l

dije rlphule referrer: tu in tigen @titers ttmt ma mating mi nf tige same. p

TO ALL WHOM IT MAY CONCERN:

Be it known that I, LYMAN S. COLBURN, of Oberlin, in Lorain county, and State of Ohio, have invented certain new and useful Improvements in Machines for Boring the Stiles of Window-Blinds and I do hereby declare that the'following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, through letters of reference marked thereon, i'orming part of this specification, and in which- Figure I represents an end elevation of my machine.

Figure 2, a-side elevation ofthe same; and

Figure 3, a plan or top view thereof.

The same letters'of reference appearing on the several figures indicate the same parts.

This invention relates to that class .of machines used for boring the stiles or framing of window-blinds, to` prepare them'to receive the`pivots of the slats, and also to mark the position for the mortises 'for the insertion of the cross-bars c f the frame, so as to insure a perfect correspondence in the two sides of said frame; and it consists, irst, in an automatic marker, for marking the mortises on both stiles atfthe same time, and simultaneously with the operation of boring; secondly, in a novel means of feeding the work to the bits and marker intermittently; thirdly, in a novel combinationv of devices for alternately operating the intermittent feed ofthe boring-bits and like feed ofthe stuff.

To enable others to make and use my invention, I will proceed to describe its construction and operation, by referring to the drawings, in which- I i A represents the frame of my machine, suitably constructed to support the working parts. In the rear portion is supported the vertical main driving-shaft B, resting in a fixed step, a, in the frame at its lower end,

and supported at or near its upper end by a collar, b, in one end of the vibrating arm C. This shaft is also provided with a worm-gear, c,.for communicating motion to the horizontal shaft E, by gearing into a suitable spurgear, e, on the rearend thereof, which will be-hereinafter more fully explained.

The vibrating arm Chas its fulcrum on a bracket or extension from the main frame at d, and is retained in position, in or out of gear, by a stub,f,. on another bracket or extension from the frame A., near its opposite end.v The shaft E is supported in suitable bearings, g y', von the upper portion of the frame A.

The front portion of the frame is provided with lugs or hooks, 7L L, on either side, which form guidesfor the vertically-sliding frame F, near its upper and lower? ends, those, h', being-also extended forwardly, to formsupports for the table G.

The frame F is also provided with forwardly-extending arms, II Il', which serve as supports, and form the -journals, for the spindles I of the boring-bits z'. This frame, F, is also extended upwardly, forming a yoke at F', embracing the shaft E, and has an intermittent vertical motion communicated to it by the eccentric-pin k, on the head, J, of said shaft, revolving within the yoke F. This frame, F, is further provided 'with an attachment, l, on the sideof the forwardly-projecting arm I-I, which extends upward and downward therefrom, parallel with the line of motion of said frame, and is grooved ou its edges, to receive the forked lower end of the marker m, which is borne upwardly in said grooves by a spring, n, on the central stem p, and is furthermore controlled in its action by a spring-lever clutch, g, operating in connection with a guard, r, as will be hereinafter more fully described.- i

The bit-stocks or mandrels I are each provided with a pulley, K, through which rotary motion is communi- `cated to them by means of cords or bands from the drum L on the main driving-shaft B.

The-head J of the horizontal driving-shaft E has attached `to it, by means of an eccentric-pin, s, a feedingdevice, consisting cfa pitman, t, claw,rw,'and rack, y; which rack being placed upon the table between the two Stiles to be bored and marked, feeds the 'stulf'forward by an intermittentmotion. l

The feed-strip N is constructed as represented in vertical section in iig. 4, which is takenv on the line :c :c

of fig. 3, having ratchet-notches on its upper surface, into which the pawl w catches, tocommunicate the feed, c

and recesses, e', on its under side, into which the n er end of the marker rotrudes, when opposite thereto,

PP P

to mark the materialat proper intervals, to indicate where the mortises are to be cut.

The operationofthe machine will be'as' follows: The stiles to be bored are placed on the table G, with the feed-strip N betweenthem, as represented in redoutlino in fig. 3, one end of each stile resting against the head of the foed-strip, and are held down by the pressure-roller P. The pawl zu is placed in the notch furthest from said head. Motion is then communicated to the shaft B from any suitable motor, which causes the boringspindles to rotate by means of cords or belts, j, passing around the drum L and pulleys K; and at the same time motion is communicated to the horizontal shaft E by the Worm c, gearing into the pinion e on its rear end. The rotation of-this shaft E gives a reciprocating motion to the pawl w by its connection with the 4wrist-pin s,

which, at every rotation, feeds the stuff forward, by means of the feed-strip N, the proper distance for the holes to be bored apart; and at the same time, or whilst the stufi` remains stationary on the table, the eccentric-pin k, on the rear of the` head J, coming in contact with the upper part of the yoke F', raises the frame F, and thus feeds the bits up to the work, so that in boring upward, all the chips fall out as they are cut. The centre portion of the marker m coming in contact with the under side of the feed-strip, causes it to yield upon its springsupport, and thu's allows the bits to bore to the proper depth; but when the feed-strip rests with one of the spaces e', over the central portion of the marker, the spring-pawl q locks in between it and its supportingpiece l, and carries it up to the boring-bits, and thus indents its chisel-edges into. the Stiles at proper points to indicate the euds of the mortises to receive the tenons of the cross-Stiles, and as the frame lowers, the bevelled end of the pawl q coming in contact with the guard r, it is disengaged from the marker, to allow the bits to operate independently thereof` at their next raising.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The marker m, arranged and operating in combination with the notches e, in the under side of the feed-` strip N, the pawl q, and reciprocating frame essentially as specified.

2. The feed-strip N, pawl w, pitmau t, and wrist s, arranged and operating substantially as shown and described.

3. The combination ofthe reciprocating spindle-frame F, the eccentric-pin lt', and wrist s, on the revolving head J', and the pitmau t and pawl w, when said piu and wrist are so arranged as to raise the bits i into the wood as soon as the pawl w has finished each feed-motion ofthe stud', substantially as set forth.

L. s. coLBURN.

Witnesses:

A.`R. HILLYER, L L. WILLcU'rr. 

